Structure of 3621-82-7
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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CAS No. : | 3621-82-7 |
Formula : | C7H3Cl2NO |
M.W : | 188.01 |
SMILES Code : | ClC1=CC=C2N=C(Cl)OC2=C1 |
MDL No. : | MFCD07368635 |
InChI Key : | LVVQTPZQNHQLOM-UHFFFAOYSA-N |
Pubchem ID : | 77175 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 11 |
Num. arom. heavy atoms | 9 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 0 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 44.03 |
TPSA ? Topological Polar Surface Area: Calculated from |
26.03 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.35 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
3.77 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
3.13 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
2.17 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
3.18 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.92 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.99 |
Solubility | 0.0194 mg/ml ; 0.000103 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-4.01 |
Solubility | 0.0184 mg/ml ; 0.0000977 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-4.15 |
Solubility | 0.0134 mg/ml ; 0.0000711 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
Yes |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
Yes |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-4.77 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<2.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
2.26 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | EXAMPLE 2 If the process is carried out as in Example 1, but 1,040 g (5 moles) of phosphorus pentachloride are used in place of 625 g (3 moles), then 145 g of 2,6-dichlorobenzoxazole are obtained, corresponding to a yield of 77percent of theory. | |
42% | With thionyl chloride; In N,N-dimethyl-formamide; at 0℃; for 1h; | General procedure: e) 2-Chloro-6-methyl-benzooxazole (2e) Intermediate 1f is placed at 0° C. in 1.76 mL of thionyl chloride. 0.47 mL of DMF is poured drop-by-drop in such a way as to keep the reaction medium at 0° C., after which it is stirred for 1 h at this temperature. After evaporation under vacuum the medium is taken up by water and extracted using ethyl acetate. The organic phases are dried and reduced to dryness. The residue obtained is purified by flash chromatography on silica (Petroleum ether-AcOEt, gradient 100-0 to 80-20 over 20 min). 0.66 g of oil is obtained (yield 65percent). TLC silica gel 60 F 254 Merck, CH2Cl2-MeOH:90-10, Rf=0.80. |
The raw mixture is reacted with phosphorus pentachloride and worked up analogously to Example 8. 138 g (73percent of theory) of 2,6-dichlorobenzoxazole in comparable purity are obtained. |
The raw mixture is reacted with phosphorus pentachloride and worked up analogously to Example 8. 115 g (61percent of theory) of 2,6-dichlorobenzoxazole are obtained. GC purity: 96.8percent. | ||
The raw mixture is reacted with phosphorus pentachloride and worked up analogously to Example 8. 92 g (49percent of theory) of 2,6-dichlorobenzoxazole are obtained. GC purity: 95.9percent. | ||
EXAMPLE 4 lf the process is carried out as in Example 1, but only 500 ml of o-dichlorobenzene is initially introduced, and the 6-chlorobenzoxazolin-2-one is metered in as a suspension in 500 ml of o-dichlorobenzene, then 2,6-dichlorobenzoxazole is obtained in the same yield and purity as in Example 1. | ||
The addition being complete, stirring is continued for a further 10 minutes. working up analogously to Example 8 results in a yield of 145 g of 2,6-dichlorobenzoxazole, corresponding to 77percent of theory. GC purity: 99.7percent. | ||
EXAMPLE 5 223.5 g (1 mole) of potassium 6-chloro-2-mercaptobenzoxazole are suspended in 500 ml of chlorobenzene and 180 g (2.5 moles) of chlorine gas are added in the course of 3 hours at a temperature of approx. 25° C. Stirring is continued for 12 hours at room temperature and excess chlorine is blown out of the mixture by means of nitrogen. The precipitated potassium chloride is filtered off and rinsed with approx. 200 ml of chlorobenzene. The filtrate is then distilled. When the sulfur dichloride and chlorobenzene have been distilled off, 171 g (91percent of theory) of 2,6-dichlorobenzoxazole are obtained, having a melting point of 49°-51° C. and a boiling point of 124°-128.5° C. under approx. 25 mbars. | ||
EXAMPLE 3 The procedure as in Examples 1 and 2 is followed, except that 600 g of chlorine are passed in instead of 480 g. 2,6-dichlorobenzoxazole is obtained in the same yield and purity. However, the additional product obtained in this case is not pure S2 Cl2 but a mixture of SCl2 and S2 Cl2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | The compound 2-(4-(hydroxyphenoxy))propionic acid methyl ester (product of the previous step, 1.97 g, 10 mmol),Potassium carbonate(1.38 g, 10 mmol),20 ml of DMF was added to the flask and reacted at 80°C for half an hour.Then the compound <strong>[3621-82-7]2,6-dichlorobenzoxazole</strong> (1.88 g, 10 mmol) was added,After reacting at 80°C for 4 hours, after cooling,Add 100 ml water and 100 ml ethyl acetate, extract,After decompression, concentrateThe residue was purified by column chromatography (petroleum ether:ethyl acetate = 80:20).2.31 g of (RS)-4-(6-chlorobenzoxazolyloxy)-phenoxypropionic acid methyl ester was obtained as a yellow oily liquid, yield 66percent. | |
2.31 g | A mixture of methyl 2- (4- (hydroxyphenoxy)) propionate (the previous product, 1.97 g, 10 mmol)Potassium carbonate (1.38 g, 10 mmol),20 ml of DMF was added to a single-necked flask,80 ° C reaction for half an hour,The compound <strong>[3621-82-7]2,6-dichlorobenzoxazole</strong> (1.88 g, 10 mmol) was then added,80 ° C for 4 hours,After cooling,After adding 100 ml of water and 100 ml of ethyl acetate, the mixture was extracted and concentrated under reduced pressure. The residue was purified by column chromatography (petroleum ether: ethyl acetate = 80: 20) to give 2.31 g(RS) -4- (6-chlorobenzoxazolyloxy) -phenoxypropionate as a yellow oily liquid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98.4% | With bis(trichloromethyl) carbonate; In toluene; at 50 - 105℃; | In a 500 ml four-necked reaction flask, 50 g (folds hundred) of 2-mercapto-6-chlorobenzoxazole and 300 ml of toluene and 40 g tris(trichloromethyl)carbonate were placed, The temperature was raised to 50 °C and the temperature was raised at a rate of 0.5 °C/min, Each heating temperature 10 °C, holding 10 minutes, when the temperature to 105 °C, reaction insulation for 1 hour, After the end of the incubation reaction, the solvent was distilled off under reduced pressure (the vacuum was maintained at -0.07 MPa when the distillation was started. when the temperature reaches 100 °C - 110 °C time, vacuum to -0.095 MPa, evaporating the solvent), solvent after evaporation to dryness, taken out when it is hot, the cooling crystallization 2,6-dichlorobenzoxazole, weight 50.82 g, content 98.1percent, molar yield 98.4percent. |
96.1% | With bis(trichloromethyl) carbonate; In N,N-dimethyl-formamide; at 110℃; for 2h; | 2) :Using 6-chloro-2-mercaptobenzoxazole and bis(trichloromethyl) carbonate as raw materials,N,N-dimethylformamide was used as a catalyst to synthesize 2,6-dichlorobenzoxazole.The molar ratio of bis(trichloromethyl)carbonate to 6-chloro-2-mercaptobenzoxazole is 1.2:3.0,Reaction at 110 ° C for 2 hours,Product purity is 98.3percent,Yield 96.1percent,1H NMR,LC/MS,The IR spectrum confirmed that the product was 2,6-dichlorobenzoxazole; |
78% | With bis(trichloromethyl) carbonate; In toluene; at 50 - 105℃; for 1.33333h; | Step 5,2mmol 2-mercapto-6-chlorobenzoxazole was placed in the flask,Add 10 ml of toluene as a solvent.4 mmol of solid triphosgene was added to the flask.Stir the temperature to 50 ° C, keep warm for 10 min,Slowly heat up again, each temperature is raised by 10 ° C10 min, when the temperature rose to 105 ° C, kept for 1 h; after extraction with sodium bicarbonate solution,Taking the organic phase and steaming it, after drying,The obtained 2,6-dichlorobenzoxazole was 0.293 g, and the yield was 78percent. |
41% | With phosphorus pentachloride; In toluene; at 120℃; for 16h; | To a solution of 6-chlorobenzo[d]oxazole-2-thiol (5.Og, 27.lmmol) in toluene (l5OmL) was added PCI5 (28.2g, l36mmol) portion wise at rt. The reaction mixture was heated at 120°C for 16h. TLC showed the reaction to be complete. The reaction mixture was concentrated under reduced pressure to dryness. The residue was dissolved in Et20 (lOOmL). The insoluble solid was filtered and the filtrate was concentrated under reduced pressure. The crude residue was purified by column chromatography using silica gel (100-200 mesh), eluting with hexane to 3percent EtOAc in hexane to afford 2,6-dichlorobenzo[d]oxazole as an orange solid. Yield: 2.lg(41percent); 1H NMR (400 MHz, DMSO-d6): O 8.01 (d, J= 1.6Hz, 1H), 7.78 (d, J= 8.6Hz, 1H), 7.49 (dd, J= 1.6, 8.6Hz, 1H). |
With phosphorus pentachloride; In toluene; for 2h;Reflux; | General procedure: The substituted 2-aminophenol (1eq.) in water and 95percent ethanol was added potassium carbonate (1eq.) and CS2 (1eq.).The mixture was heated under reflux for 3 hours. After cooling, the solution was neutralized with 15 mL of acetic acid in 30 mL water. The precipitate was collected to give 2-thiolbenzoxazoles. Then, the substituted 2-thiolbenzoxazoles (1eq.) dissolved in toluene, PCl5 (1.5eq) was added dropwise. The mixture was heated to reflux for 2 hours. After the solvent was evaporated, the crude product was purified by silica gel column chromatography using PE-EA as an eluent. | |
With thionyl chloride; for 2h;Reflux; | General procedure: Potassium hydroxide (46 mmol), ethanol (25 mL) and water (10 mL) were added to a dried round-bottomed flask sequentially, followed by the dropwise addition of CS2 (25 mmol), after 15 min, (un)substituted 2-aminophenol (23 mmol) was added, then the resulting solution was heated to reflux for 4 h. The reaction solution was acidified to pH~4 with dilute hydrochloric acid and then poured into water, extracted with ethyl acetate, the organic phase was washed with brine, dried over anhydrous magnesium sulfate, concentrated under reduced pressure and the residue was purified via silica gel column chromatography to obtain the intermediate the (un)substituted 2-mercaptobenzoxazole as a yellow solid. Then, the (un)substituted 2-mercaptobenzoxazole (5.5 mmol) was refluxed in SOCl2 (15 mL) for 2 h, excessive SOCl2 was removed under reduced pressure to give (un)substituted 2-chlorobenzoxazole as a yellow solid which was used in next reaction without further purification. Finally, 60 percent of NaH (1.0 mmol) was added into a solution of 3,3-dichloroallyloxyphe-noxy intermediates (1.0 mmol) in THF (5 mL), after 2 h, (un)substituted 2-chloro-benzoxazole (1.0 mmol) was added, the reaction mixture was stirred for another 5 h at room temperature. The reaction mixture was poured into water and extracted with ethyl acetate, the organic phase was washed with saturated sodium bicarbonate, brine, dried over anhydrous magnesium sulfate, concentrated and the residue was purified via silica gel column chromatography to afford the title compounds. |